Transmission mechanism.



No. 844,210. PATBNTBD PEB. 12, 1907. I'. STRIGKLAND.

TRANSMISSION MEGHANISM.

APPLIGATION FILED JUNE 9. 190s.

h-"LE- l- "FRAKSTRICKLAND, OF MUSKOGEE, INDIAN TERRITORY.

raansmlssson meenemen.

Specification of Letters IPatent.

Patented Feb. 12, 190'?D Application filed June 9, 1906. Serial No. 320,960.

To all whom t may concern:

Be it known that l FRANK STRICKLAND, a citizen of the United States, and a resident of Muskogee, District 10, indian Territory, have invented a new and Improved Transmission Mechanism, of which the 4following is a full, clear, and exact description.

This invention relates to transmission mechanisms.

The object of the invention is to produce a mechanism of" this class which will operate to transmit power at a varying-speed ratio.

The invention is applicable in connection with many machines having a reciprocating part which does work on' one stroke only.

By means of the invention the return stroke is made at a greater speed, so that the power is most advantageouslyapplied to the work.

The invention consists in the construction and combination of parts to he more fully described hereinaiter and particularly set forthv in 'the claims.

Reference is to be had to the accompanyi ing drawings, forming a part of this speciiication, in which similar characters of reference indicate corresponding parts in both views.

Figure 1 is a side elevation of the mechanism, a portion of the trame thereof being broken away 3 and Fig. 2 is a plan of the mechanism, certain parts being broken away and shown in section t( lisolose the structure more completely.

Referring more particularly to the parts, 1 represents the frame of the .mechanism, which may have the rectangular form shown in Fig. 2, said frame being supported upon legs 2, as indicated in Fig. 1. This frame 1 presents oppositelydisposed parallel side bars 3. On these side bars 3 there is rotatably mounted a pair of gear-wheels 4 and 5, which are rigidly attached together. Meshin'g with these gears there is a second pair of' gear-wheels 6 and 7. These gear-wheels 6 and 7 are not rigid with each other, the gearwheel 6 being rigidly attached to a tubular shaft 8, which projects at one side of the frame and carriesa rigid crank 9, asindicated; To this crank 9 a pitman or connecting-rod l() is attached, and this pitman affords means for transmitting power to the'transmission mechanism by any suitable means, such as the cylinder 11. The gear-wheel 7 is rigidly attached to a shaft 12, which carries a rigid crank 13, and this crank 13 has attached theretoa pitman or connecting-rod 14; The

1 lower extremity of this connecting-rod 14 is attached pivotally to a cross-head pin 15, which is carried by a plunger or piston 16, to which the power is being transmitted. This plunger 16 is guided in a vertical direction through a suitable guide-bracket 17.

As indicated most clearly in Fig. Y1, the

gear-wheels 4 and 6 are of common form, being circular and mounted upon the geometrical centers of the axes of rotation. T he gear-wheels 5 and 7, however, are of special form. That portion of the gear-wheel 5 which is disposed to the left of a vertical line passing through the shaft of this gear is substantially circular, but the right-hand portion of the gear is lextended laterally on a horizontal axis, so that the gear-wheel pre'- stnts substantially the outline oi' an egg or oval. The gear-wheel 7, which meshes with this gear, is correspondingly but oppositely formed-that is, its hal-f portion which lies to the right of a vertical line passing through the axis of the gear is of substantially circular form, while the half portion of the gear adjacent to the gear-w heel 5, as viewed in F ig. 1,

is llattened as indicatedthat is, the degree of' curvature of the pitch lpart of the gear is reduced.' T he gears mes with each other as indicated, so that when one of thegears is presenting an abnormally long radius from .duringuthe rest or" the rotation the other 'gear will rotate ata higher speed. From this arrangement and from an inspectionof Fig. 1 it will he evident that upon the upstroke of the plunger 16 the plunger will be moving at a lower .velocity than upon its downstroke, the direction of rotation being that re resented by the arrow' shown in Fig. 1. vidently the vs eed of the plunger will be acceleratingfon t e downstroke until the point is reached near themid-position of the lunger, whereupon the velocity will dimnis gradually te the end of the stroke. The movement in the opposite direction will be substantially uniformi, since the radii ofthe gears on this stroke will remain at a substantially IIO constant ratio. a highly advantageous one in inuny connections where the pmver is to he delivered principally on one stroke of the plunger. An ordinary hey'lmling press is en cx lample of n case in which the trrnlsinission mechanism can he very adventngcously employed. The slow movement of thc plunger will he util izcil for com pressing;` the baile of hay, while the rfa-- turn movement of the plunger will he accomplished. l l A lrleving thus described my invention, l clsiini as new enti desire to secure hy Letters Patent l. Ine transmission mecluinisni, in eon1- hinzition, suhstznrtizrlly rectangular freine, :i genrewheel of suhstzuntizilly circuler forni mountctt in said freine, aseeoni geur-wheel of substantially circular forni mounted in seid frame und. meshing' with said first geer- Wheel, s lthirtl. gear-wheel rigirgi with seid sceond gear-Wheel, n fourth gein-'\vlniel having the seine exis of rotation with seifl .first Wheel andgii'nlepondently rotetfthle with. fespect to the seine., shiil "fourth g'eitrnvhcel meshing with seid lthird geur-wheel, sail third. nnfl fourth gcarwlieels havin nn irrenw ulnr form )roiueing` it van-inl)lespee:l ratio between the seme, :i crank cnrrietl. by seil quickly first gear-wheel, nconneating-roti attached to said crank and nffl'orring ineens vfor rotating the speed, a, crank rigid with sind fourth gestr- Wheel, a plunger, ineens for guiding; the sume to slide longitudinall'iY enti n cminectingJr oil connecting; seid second, erzinli 'ith seid. plunger whereby sind plunger muy he driven Such a movement as this is same at u substantially uniform einen mounted in seid. freine, a, second gear-Wheel of substantially circuler ferm mounted in saisi freine and meshing with seid first gear-Wheel, n, third gear-wheel rigid with seid second gearwheel, a fourth gear-wheel having the same exis of rotation with seid first gear-Wheel and 'inzlcpenzlently rotatable. with respect te the stn'ie, said fourth gear-Wheel meshing with sii-iol thirol gear-wheel, said third and fourth lgear-wheels having en irregular forni producing u variable-speed ratio between the seme, nv crank carried by sind first veer-Wheel, a cennectingyrorl :attached to sind crank sind affording means for rotating the lsaine at a substantially uniform speed, e, crank rigid with seti fourth geenwheel, n plun,g ;er,` means for guii'ing the seine to slide longitudinally, a, e `eonnecting-rod connecting seid second crank with snifl plunge whereby said plunger 1n ny he driven et n slow speezi on its forward stroke and. :it a hiOh s eed on the return stroke, tubularsh nft carrying seid first geur and sail. first crunk', inizi e sha-ft carrying said fourth ,flezirvvheel fin-l rotate-bly mounted in sei'fl ltubular shaft anzi in seid freineA In testimony .whereof I have signed my niinle to this specification in the presence of tivo subscribing witnesses. f

, FRANK STRICKLND. Witnesses:

HARRY G. DAVIS, Minori' Winrn. 

